科學家確認:手機輻射可誘發癌症
WARNING: Holding a cellphone against your ear or storing it in your pocket may be hazardous to your health.
警告：將手機貼在耳邊或者塞在口袋裏可能有害健康。
This paraphrases a warning that cellphone manufacturers include in the small printthat is often tossed aside when a new phone is purchased. Apple, for example, doesn't want iPhones to come closer to you than 1.5 centimeters; Research In Motion, BlackBerry's manufacturer, recommends 2.5 centimeters.
在消費者購置新機後，常對手機廠商印在不起眼位置的小字警告不以爲然。例如，蘋果公司提醒稱iPhone手機距離人體至少要有1.5釐米，黑莓手機生產商RIM公司建議最小距離爲2.5釐米。
If health issues arise from cellphone use, the implications are huge. Voice calls - Americans chat on cellphones 2.26 trillion minutes annually - generate $109 billion for the wireless carriers.
如果手機使用可導致健康問題，後果將很嚴重。美國每年手機通話的時長共計2.26萬億分鐘，這些語音通話爲無線運營商帶來了1090億美元的收入。
Devra Davis, an epidemiologist who has worked for the University of Pittsburgh, has published a book about cellphone radiation, "Disconnect." The book surveys scientific research and concludes the question is not settled.
匹茲堡大學的流行病學專家德芙拉 戴維斯出版了一本有關手機輻射的書《關機》。這本書對有關科學研究進行了調查，其結論是：這個問題還沒有定論。
Brain cancer is a concern that Ms. Davis examines. Over all, there has not been an increase in its incidencesince cellphones arrived. But the average masks an increase in brain cancer in the 20-to-29 age group and a drop for the older population.
腦癌是戴維斯女士研究的輻射後果之一。總體而言，自手機出現以來，腦癌發病率並未上升。但這一平均率掩蓋了如下事實：腦癌在20至29歲年齡羣體中的發病率增加，而在老年人羣中的發病率下降。
"Most cancers have multiple causes," she says, but she points to laboratory research that suggests low-energy radiation could damage cells that could possibly lead to cancer.
她說：“大多數癌症具有多種病因。”但她指出，實驗室研究表明，低能輻射會損害人體細胞，而這又有可能導致癌症。
Children are more vulnerable to radiation than adults, Ms. Davis and other scientists point out. Radiation that penetrates only five centimeters into the brain of an adult will reach much deeper into the brains of children because their skulls are thinner and their brains contain more absorptive fluid. No studies have yet been completed on cellphone radiation and children, she says.
戴維斯女士及其他一些科學家指出，兒童比成人更容易受到輻射的影響。由於兒童的顱骨更薄，而且大腦中含有更多易吸收輻射的液態物質，因此滲入成人大腦僅5釐米的手機輻射能夠滲入到兒童大腦內更深的區域。她表示，手機輻射對兒童影響方面的研究目前還不完善。
Henry Lai, a research professor in the bioengineering department at the University of Washington, began laboratory radiation studies in 1980 and found that rats exposed to radiofrequency radiation had damaged DNA in their brains.
華盛頓大學生物工程系研究教授賴亨利自1980年開始進行輻射實驗研究。他發現，受到射頻輻射的實驗鼠腦組織DNA會受損。
Ms. Davis recommends using wired headsets or the phone's speaker. Children should text rather than call, she said, and pregnant women should keep phones away from the abdomen.
戴維斯女士建議大家使用有線耳機或手機揚聲器，兒童應儘量收發短信而不是打電話，而懷孕婦女應將手機遠離腹部。
